21112200122202 has 192 divisors, whose sum is σ = 53442783313920. Its totient is φ = 5899211856000.

The previous prime is 21112200122201. The next prime is 21112200122287. The reversal of 21112200122202 is 20222100221112.

It is a happy number.

21112200122202 is a `hidden beast` number, since 211 + 1 + 220 + 0 + 12 + 220 + 2 = 666.

It is a super-2 number, since 2×21112200122202² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21112200122201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1312042177 + ... + 1312058267.

It is an arithmetic number, because the mean of its divisors is an integer number (278347829760).

Almost surely, 2^{21112200122202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21112200122202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26721391656960).

21112200122202 is an abundant number, since it is smaller than the sum of its proper divisors (32330583191718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21112200122202 is a wasteful number, since it uses less digits than its factorization.

21112200122202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17449 (or 17446 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21112200122202 its reverse (20222100221112), we get a palindrome (41334300343314).

The spelling of 21112200122202 in words is "twenty-one trillion, one hundred twelve billion, two hundred million, one hundred twenty-two thousand, two hundred two".